S. 17(2) : Salary-Perquisite-Employer’s grant of interest-free loans or loans at concessional rate would qualify as a ‘fringe benefit’ and ‘perquisite’ as understood through its natural usage in common parlance-Enactment of subordinate legislation for levying tax on interest-free/concessional loans as a fringe benefit is within rule making power under section 17(2)(viii) and enactment of rule 3(7)(i) is not a case of excessive delegation and falls within parameters of permissible delegation. Rule 3(7)(i) is intra vires section 17(2)(viii) and therefore, section 17(2)(viii) does not lead to an excessive delegation of ‘essential legislative function’ to CBDT-Fixation of SBI’s rate of interest, i.e., PLR, as benchmark to determine value of benefit to assessee in comparison to rate of interest charged by other individual banks under rule 3(7)(i) is neither an arbitrary nor unequal exercise of power and is intra vires article 14 of constitution of India. [S.17(2)(viii), Rule 3(7)(i), Art. 14, 136]